Microstructure evolution in an Al-Si piston alloy under ultrasonic melt processing

Joint 5th International Conference on Advances in Solidification Processes;5th International Symposium on Cutting Edge of Computer Simulation of Solidification, Casting and Refining

土木建筑工程;计算机科学

Chankitmunkong, Suwaree^1^2 ; Eskin, Dmitry G.^2^3 ; Limmaneevichitr, Chaowalit^1

Department of Production Engineering, Faculty of Engineering, King Mongkut's University of Technology Thonburi, 126 Pracha-Utid Rd., Bangmod, Tungkhru, Bangkok

10140, Thailand^1

Brunel University London, BCAST, Uxbridge, Middlesex

UB8 3PH, United Kingdom^2

Tomsk State University, Tomsk

634050, Russia^3

关键词: Al-Si eutectic alloys;    Al-si piston alloys;    Casting conditions;    Complex compositions;    Direct chill cast;    Heterogeneous structures;    Micro-structure evolutions;    Potential benefits;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/529/1/012060/pdf
DOI  :  10.1088/1757-899X/529/1/012060

来源: IOP

【 摘 要 】

Piston Al-Si eutectic alloys are used to produce direct-chill cast billets for subsequent forging. Because of a very complex composition and multi-phase heterogeneous structure, it is necessary to control the formation of primary and eutectic compounds either through alloying or casting conditions (or both). In this study we used ultrasonic melt processing above or across the liquidus line to affect the occurrence and size distribution of primary Si as well as morphology of primary Al dendrites and high-temperature eutectic phases. The refinement of these particles has potential benefit for mechanical properties and formability during forging.